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NEW YORK (
TheStreet) -- The hedge fund industry's most prestigious conference has its most star-studded cast yet.

The
Ira Sohn Conference, whose proceeds go toward treating pediatric cancer and related childhood diseases, is home to some of the hedge fund world's brightest stars, and this year is no different. The speakers include Bill Ackman, David Einhorn, Jeffrey Gundlach and many more. The event will be held May 8 in New York.

The six-hour Ira Sohn Conference makes tight-lipped billionaire investors loquacious. Just last year,
Doubleline Capital's Gundlach announced he was short
Apple(AAPL - Get Report) as part of a pair trade with natural gas, which has turned out to be correct.
Earlier this year, he said Apple would plummet to $425, which proved to be a prescient call.

In contrast,
Greenlight Capital's Einhorn has been
entangled with Apple and its management team, asking for the Cupertino, Calif.-based tech giant to return more cash to shareholders to help boost its lagging stock price. At the 2011 Ira Sohn conference, Einhorn made noise, suggesting
Microsoft(MSFT) would be better off without CEO Steve Ballmer, and hinted that he was buying a minority portion of the New York Mets for $200 million. That purchase was later thwarted by the Mets, which apparently reneged on its end of the bargain.

Ackman has been entrenched in one of Wall Street's most riveting stories, as his battle with
Herbalife(HLF - Get Report) and Carl Icahn play out in
public. Ackman has shorted the stock, saying it's a fraudulent company. Conversely, Icahn and other notable hedge fund managers are long Herbalife, which recently
named two of Icahn's associates to its board.

The
Pershing Square CEO has had a rough go of it with one of his other high-profile investments,
J.C. Penney(JCP - Get Report), as the embattled retailer has fallen 20% this year amid slowing sales and worries that CEO Ron Johnson is the right man to lead the company. Ackman is on the board of directors at J.C. Penney, only adding to the drama.

In addition, Ackman is on the board of directors at two of his other investments,
Howard Hughes(HHC - Get Report), where he is chairman, and
Canadian Pacific Railway(CP - Get Report).